Answer: QS is 76
Step-by-step explanation:
Since R is the midpoint of QS:
1) 2x+16 = 5x-17
2) 2x+16+17 = 5x-17+17
3) 2x-2x+33 = 5x-2x
4) 33 = 3x
5) 11 = x
Since the sum of QR and RS equal QS:
1) (2·11+16)+(5·11-17) = QS
2) 22+16+55-17
3) 76 = QS
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